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Date: Fri, 13 Jul 2007 15:54:25 -0700 (PDT)
From: Christoph Lameter <clameter@sgi.com>
Subject: RE: [PATCH 0/7] Sparsemem Virtual Memmap V5
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To: "Luck, Tony" <tony.luck@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org, linux-arch@vger.kernel.org, Andy Whitcroft <apw@shadowen.org>, Nick Piggin <npiggin@suse.de>, Mel Gorman <mel@csn.ul.ie>
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On Fri, 13 Jul 2007, Luck, Tony wrote:

> > How many tests were done and on what platform?
> 
> Andy's part 0/7 post starts off with the performance numbers.  He
> didn't say which ia64 platform was used for the tests.
> 
> Looking my logs for the last few kernel builds (some built on a
> tiger_defconfig kernel which uses CONFIG_VIRTUAL_MEM_MAP=y, and
> some with the new CONFIG_SPARSEMEM_VMEMMAP) I'd have a tough time
> saying whether there was a regression or not).

I'd be very surprised if there is any difference because the IA64 code for 
virtual memmap is the source of ideas and implementation for SPARSE_VIRTUAL.